Protesters hurled petrol bombs at a police vehicle, causing it to catch fire, during a day of violent clashes in Hong Kong on November 17 .
Video of the incident shows a number of Molotov cocktails raining down on a police van that approached protesters on a bridge near Hong Kong Polytechnic University.
Earlier in the day, police had fired tear gas and water cannon at protesters outside the university.
Some protesters responded by firing items via catapult. Local reports also said a police officer was injured in the leg by an arrow fired by protesters. Credit: Antony Dapiran via Storyful